Cosmological Constraints from Hubble parameter $H(z)$ and SN Ia observations

TL;DR

This paper combines observational Hubble parameter data, BAO, and CMB measurements to constrain the flat $ m f extLambda$CDM cosmology, confirming an accelerating universe consistent with other independent observations.

Contribution

It introduces a combined analysis of $H(z)$, BAO, and CMB data to provide robust constraints on cosmological parameters, highlighting the complementarity of these probes.

Findings

Supports an accelerating flat universe model

Results align with other cosmological observations

Demonstrates the complementarity of $H(z)$ data with BAO and CMB

Abstract

In this paper, we use a set of observational $H(z)$ data (OHD) to constrain the $\Lambda$CDM cosmology. This data set can be derived from the differential ages of the passively evolving galaxies. Meanwhile, the $\mathcal {A}$-parameter, which describes the Baryonic Acoustic Oscillation (BAO) peak, and the newly measured value of the Cosmic Microwave Background (CMB) shift parameter $\mathcal {R}$ are used to present combinational constraints on the same cosmology. The combinational constraints favor an accelerating flat universe while the flat $\Lambda$CDM cosmology is also analyzed in the same way. We obtain a result compatible with that by many other independent cosmological observations. We find that the observational $H(z)$ data set is a complementarity to other cosmological probes.